【单选题】关于玻璃离子水门汀下面哪一项是正确的( )
B.
比银汞强度差,与牙齿化学结合,对牙髓刺激性小
C.
与银汞强度相似,与牙齿化学结合,对牙本质和牙髓无刺激
D.
与银汞强度相似,与牙齿化学结合,对牙髓有刺激
【简答题】Too often the parents try to mold their childen_____something they do not wish to be.
【单选题】Some children hate _____ when their parents try to join their circle of friends. [ ]
【判断题】Western parents try to respect their children’s choices, and provide them with a favorable environment.
【单选题】设计桩核冠要求时,根尖应保留根充物的长度为
【单选题】(2分) 为提高螺栓的强度,可采用( )的措施。
【单选题】在色彩的RGB系统中,十六进制颜色表示方法中#000000表示的颜色是( )。